I'm in District 21. Their GNT page has not been updated to the new charts, but does say
"The ACBL District 21 2018–19 Grand National Teams will be played according to the Grand National Teams 2018–2019 ACBL Special Conditions of Contest (not yet available), with District 21 ...

Hi Steve,
Yes I had noticed this problem (https://bridgewinners.com/article/view/all-strong-club-players-are-now-bidding-2d-with-short-diamonds/), but found out that my district's GNT B would use Open. It might be worth checking if the events you care about use Basic+.
I don't think folding 4=4=1=4s into 1 ...

"I found the Caroline Club notes. They look good, but I haven't yet assessed whether we can learn the system from them."
Certainly understandable. I originally wrote the notes as a reference for me and my partners, and was surprised to discover that others had found the notes and ...